Apparatus for controlling vehicle drive system including engine with turbocharger, and lock-up clutch

Abstract

An apparatus for controlling a lock-up clutch disposed in a drive system of an automotive vehicle which includes a lean-burn engine provided with a turbocharger. The apparatus is arranged to place the lock-up clutch in a fully engaged state and/or a slip control state while a running condition of the automotive vehicle is in a predetermined engaging area or slip control area of the lock-up clutch. The apparatus includes an engaging-area changing device operable to change the engaging area of the lock-up clutch, on the basis of a turbocharging pressure established by the turbocharger, and/or slip-control-area changing means for changing the slip control area, on the basis of the turbocharging pressure. Also disclosed is an apparatus for controlling a lean-burn engine provided with a turbocharger, which apparatus includes a device for changing a range of an air/fuel ratio of an air-fuel mixture of the engine for a given turbocharging pressure, on the basis of at least one of operating state and slipping state of the lock-up clutch.

Dependencies are inferred from the claim text.